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1ad38ef4db
Current name of coresight component's folder consists of prefix of the device and the id in the device list. When run 'ls' command, we can get the register address of the device. Take CTI for example, if we want to set the config for modem CTI, but we can't know which CTI is modem CTI from all current information. cti_sys0 -> ../../../devices/platform/soc@0/138f0000.cti/cti_sys0 cti_sys1 -> ../../../devices/platform/soc@0/13900000.cti/cti_sys1 Add label to show hardware context information of each coresight device. There will be a sysfs node label in each device folder. cat /sys/bus/coresight/devices/cti_sys0/label Signed-off-by: Mao Jinlong <quic_jinlmao@quicinc.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Link: https://lore.kernel.org/r/20250816072529.3716968-2-quic_jinlmao@quicinc.com
89 lines
2.1 KiB
YAML
89 lines
2.1 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/arm/qcom,coresight-ctcu.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: CoreSight TMC Control Unit
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maintainers:
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- Yuanfang Zhang <quic_yuanfang@quicinc.com>
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- Mao Jinlong <quic_jinlmao@quicinc.com>
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- Jie Gan <quic_jiegan@quicinc.com>
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description: |
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The Trace Memory Controller(TMC) is used for Embedded Trace Buffer(ETB),
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Embedded Trace FIFO(ETF) and Embedded Trace Router(ETR) configurations.
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The configuration mode (ETB, ETF, ETR) is discovered at boot time when
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the device is probed.
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The Coresight TMC Control unit controls various Coresight behaviors.
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It works as a helper device when connected to TMC ETR device.
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It is responsible for controlling the data filter function based on
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the source device's Trace ID for TMC ETR device. The trace data with
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that Trace id can get into ETR's buffer while other trace data gets
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ignored.
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properties:
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compatible:
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enum:
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- qcom,sa8775p-ctcu
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reg:
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maxItems: 1
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clocks:
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maxItems: 1
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clock-names:
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items:
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- const: apb
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label:
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description:
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Description of a coresight device.
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in-ports:
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$ref: /schemas/graph.yaml#/properties/ports
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patternProperties:
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'^port(@[0-1])?$':
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description: Input connections from CoreSight Trace bus
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$ref: /schemas/graph.yaml#/properties/port
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required:
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- compatible
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- reg
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- in-ports
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additionalProperties: false
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examples:
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- |
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ctcu@1001000 {
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compatible = "qcom,sa8775p-ctcu";
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reg = <0x1001000 0x1000>;
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clocks = <&aoss_qmp>;
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clock-names = "apb";
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in-ports {
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#address-cells = <1>;
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#size-cells = <0>;
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port@0 {
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reg = <0>;
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ctcu_in_port0: endpoint {
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remote-endpoint = <&etr0_out_port>;
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};
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};
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port@1 {
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reg = <1>;
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ctcu_in_port1: endpoint {
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remote-endpoint = <&etr1_out_port>;
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};
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};
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};
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};
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